Adjustable concrete form



Feb. 1o. 1925. 1,525,702

O. C. TALBOT ADJUSTABLE CONCRETE FORM N Filed Jan. 8, 1925 1 f, il 5f,

y//f y $9 Ato the ange 2 and from a point s li Patented Feb. l0, 19.25. v

UNITED STATES l 1,525,702 PATENT OFFICE.

OLIVER c. TALBOT, or KANSAS CITY, MISSOURI.

Application med January s, 1923. serial No. 611,494.

4To all whom z't may concern:

Be it known that I, OLIVER C. TALBOT, a citizen of the United States, and resident of Kansas City, county of Jackson, State of Missouri, have invented a. certain new and useful Improvement in Adjustable Concrete Forms, of which the following is a complete specification. f 4

This invention relates to concrete forms and more especially to forms for laying concrete floorsv and the like, and the object is to produce a permanent form construction adjustable as to width and depth and hence adapted for meeting all conditions encountered in laying concrete floors.

With this general object in view the invention consists in certain novel and useful features of construction and Organization `of and claimed; and in order that it may be fully understood, reference is to be had to the accompanying drawing, in which Figure 1 is a vertical section illustrative of the construction and use of a plurality of form units embodying the invention;

Fi re 2 is an enlarged section on'the line I-II of Figure 1;

Figure 3 is an inverted plan of the form units, the same Vbeing shown on avsmaller scale than in Figuresl and 2;

Fi e 4 is a section on the line IV-IV of Flgure 1;

V of Figure 1;

F' re V6 is an enlarged section on the line of Figure 1;

Figure 7 is a fragmentary perspective view of one of the plate-securing bars;

Figure 8 is a section on thel line VIII-VIII of Figure 1; and

Fi re 9 isl a detail perspective view of the e ements of a fastener for securing bars ad'ustably together.

eferring now to the drawing in detail, 1

indicates a plateof steel or the like, of rectan ar form, and provided at one margin wit a Iiange 2. Extending at right anlglas t y s aced therefrom to the opposite margin of the plate at the inner side thereof, is a pair of bars 3 referably of U-sha e and provided at tige upper edges wit outwardly projecting flanges 4 fitting flatly against plate 1 and spirit-welded or otherwise secured rigidly t ereto each bar constituting a keeper or guide, and having a longitudinal margin of said plate.

Y therewith,

F1 e 5 is an enlarged section on the line I i 'gm mg provided with longitudinal serles of perseries of perforations. A plate 5 similar to plate 1, is provided at one margin with a flange 6 corresponding to flange 2, and is adapted in conjunction with plate 1, to span or bridge a suitable space for a part .of a concrete flooring F, the flanges 2 and 6 being adapted to determine the adjacent sides of a pair o f depending stifi'enin ribs R for the flooring. The plate 5 is adpted for overlapping more orless the plate 1, and a pair of bars 7 is disposed side Of plate 5 and extend from a point adjacent ilange 6 thereof toward the opposite Said bars are adapted to be fitted in the bars or keepers 3, and are provided with a corresponding series of perfo-rations.

To 1 between plate 5 and bars 7, thelatter are spaced slightly below plate 5 and parallel and at their ends adjacent iange 6are rigidly equipped with angle plates 8 which project slig tly` upward beyond the upper edges of bars 7 and flatly engage the underside of plate 5. These angle plates form laterally widened portions of bars 7, and are spot-welded Or otherwise secured tO the underside of plate 5` so that said plate andbars 7 shall be of substantially integral construction. The bars 3 and 7 are provided with arms 9, projecting in the same' direction as the flanges 2 and 6 respectively, and spaced slightly therefrom, said arms beforations as shown.

Narrow rib or beam plates 1()A for determining the bottom of the ribs R, are provided With marginal flanges 11, for fitting betwen the flanges 2 and 6 and the adjacent arms 9 spaced from said flanges as explained, the juxtaposed flanges of the floor plates l and 5, and of the rib or beam plates '10 constituting the partsof the form fo-r de ning the sides of the ribs or beams, and in order to secure the said juxtaposed iiangesv together, they are provided with arms 12, preferably in the form of U-shaped keepers like bar's 3, and are spot-welded or otherwise secured to said flanges 11. The arms 9 extend through said arms or keepers 12, which, like the arms 9 are prefera ly provided with a series of perforations forA registration with certain of the perforations of the arms 9. Any suitable fastening devices may be employed secure the bars 3 and at the inner provide for the interposition of platev eol ment, and to secure the arms 9 and 12 together at the desired point of adjustment. The referred construction for aecomplishing tliis purpose is a staplelike member 13 provided with notches 14 in the inner sides of its legs, and a notched key member 15 adapted to span the space between the legs and engage the notches 14 thereof. The construction thus far described with the addition of bars 16 (one in the form of a keeper and the other of plain bar form) constitutes one complete form unit, a number of such units being required to lay a' Hoor. The unit described obviously is `adjustable to accommodate or span spaces slightly exceeding the width of plate l, up to a width slightly less than the combined width of members 1 and 5, and the relation between the flanges of said plates and the anges of the beam plates is such that the depth ofthe beams can be likewise varied by adjustment of arms 12 on arms 9.

In arranging the units, they are disposed so that the adjacent rib or beam plates overlap to define thevbottom of a rib or beam, the keeper bar 16 of one beam plate receiving the plain bar 16 of the cooperating overlapping rib or beam plate, which bars are then secured together, as by bolts 17 and nuts 18, as shown by Figure 6.

vIn Figure 1, a complete unit of the character described is shown and segments of two adjacent or cooperating units appear in cooperative relation with the complete unit, that is to say adjacent units are arranged with their respective plates 10 arranged in overlappingrelation so as to constitute in conjunction therewith the bottoms of the ribs or beams, the flanges of the adjacent units constituting the forms for the opposite sides of the beams.

Each unit may be provided with two sets of fastening bars or keepers as shown by Figure 2, or may be provided with a single set or with three or more sets as Will be readily understood, and in Figure 2, it will be seen that juxtaposed units spanning the space between the same vribs or beams, are adapted to be arranged in overlapped relation, it being understood i'n this connection thatthe overlapping of the various plates will result in irregularities or jogs in the surface of the concrete after the forms are removed` but that this is not objectionable as a coating of plaster or the like will provide for a smooth and uniform finish if such is desired.

In the event a space wider than the combined widths of plates l and 5, bars can be employed to bridge the span between bars 3 and 7 and be secured thereto and an unflanged or at plate be placed thereon between plates 1 and 5, or it may overlap and rest on said plates.

It will be apparent from the foregoing j plate; said plates havingx that a construction of Athe character described dispenses with the necessity of using the multitude of struts or braces necessary to support the conventional type of concret'e Hoor forms, and that the Work and cost of laying fioors will be reduced. The first cost of the forms will be greater than that of the conventional type, but they can be `used repeatedly and will meet all conditions as to depth or thickness and distance between ribs or beams.

From the above description it will be apparent that details of construction and arrangement of parts may be varied Without departure from the principle of construction involved or from the spirit and scope of the appended claims, and that the forms may be employed in concrete work other than flooring.

I claim:

1. Concrete form construction, comprising a plate, a bar secured to one side of the plate, a second plate for cooperation with the first-named plate in spanning space, and a bar rigid with and spaced from the second plate for underlying the rst plate when the same is overlapped by the second late, and fitting sidewise against the bar o the first plate; said plates having projecting flanges at the edges adjacent the remote or outer ends of said bars, and means for securing the said bars rigidly together.

2. Concrete form construction, comprising a plate, a bar secured to one side of the plate, a second plate for cooperation with the rst-named plate in spanning space, and a bar rigid with and spaced from the second plate for underlying the first plate when the same is overlapped by the second plate, and fitting sidewise against the bar of the first projecting flanges at the edgestadjacent e remote or outer ends of said bars, and means for securing the said bars rigidly together, .in combination with plates having flanges fitting flatwise against the flanges of the first and second plates, a-nd means for securing the last-named plates in rigid relation to the vsaid first and second plates.

3. Concrete form construction, comprising a plate, a bar secured to one side of the plate, a second plate for cooperation with the first-named plate in spanning space, and a bar rigid with and spaced from the second plate for underlying the vfirst plate when the same is overlapped by the second plate, and fitting flatwise against'the bar of the first plate; said plates having projecting flanges at the edges adjacent the remote or outer ends of said bars, and means for securing the said bars rigidly together, in combination with plates having flan es fittino' fiatwise against the flanges of t e first an second plates, arms rigid with and projecting respectively from the outer endsl of the rst-named bars and parallel with and spaced from the flanges respectively of the first and second plates and tting flatly against the flanges of the third plates, and

arms secured to the last-named ilanges and 0 the arms projecting from the first-named ars.

4. In a concrete form construction, an angle plate, and an angle bar arranged Within the angle of the plate with its arms parallel with but slightly spaced from the respective sections of the plate, tlie angle bar adjacent its corner being rigidly `secured to the angle plate.

5. IIn a` concrete form construction, an angle plate, and an angle bar arranged within the angle of the plate with its arms parallel with but slightly spaced from the respective section of the plate, the angle bar at its corner havinga widened portlon engaging and rigidly secured to the angle late. 'p ,6. In a concrete form construction, an angle plate, an angle bar arranged within the angle of the plate with one` of its arms rigidly secured to the respective or adjacent portions of the angle plate and its other arm parallel with but slightly spacedl from the adjacentor respective portion of saidy plate, in combination with an angle plate having one arm fitting between the spaced arm of the bar and 'irst-named plate, and an arm fitting against and parallel to said spaced arm a. `cured to said interposed arm of the second angle plate, and means to secure said last-namedv arms together.

7.. In a form, 'a sheet metal angle late and a bar of correspondingly angular orm', the corner of thebar fitting Within the angle of the plate and the arms of the bar extend- ,ing parallel with and spaced from the respect-ive portions of the plate; and angle plates permanently secured to the cornerv of the bar and to the corner of the plate.

In witness whereof I hereunto alix my signature.

OLIVER C. TALBOT. 

